Rotary engine



H. F. HANSEN.

ROTARY ENGINE.

APPLlcAlou FILED FEB. 7, 1918.

Eea-tme@ Mar. 2

3 SHtETS-SHEET l.

, y How/f H. Fl HANSEN.

ROTARY ENGINE.

APPLICANO .flLD Y. 191s.

H. F, HANSEN.`

ROTARY ENGINE. APPUCATION FILED fes. 1,1918.

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8 SHEETS-SHEET 3..

.Panama Mar. 21, 1922.

H. F. HANSEN.

ROTARY ENGINE.

, APPLICATION FILED FEB. 7, 1918.

1,410,099, Patented Mar.. 21, 1922.

8 SHEETS-SHEET 5.

H. FQ HANSEN.

ROTARY ENGINE.

. AP'PLICATION FILED FEB. 7, 1918- l y 1,410,099. Patented Mar-21,192.2;-

s. swims-SHEET e? H. F. HANSEN.

ROTARY ENGINE..

APPLICATION FILED FEB.7, 191B.

1,410,099. Patented Mar. 21, 1922.

a SHEETS-SHEET 7.

H. F. HANSEN.

ROTARY ENGINE.V

APPLICATION FILED FEB. 7.- 191B.

, Patented 1131.21, 1922.

8 SHEETS-SHEET 8.

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Arrow/Ey HARVEY Il?. HANSEN, OF OAKLAND, CALIFORNIA.

ROTARY ENGINE.

Specification of Letters Patent.

Patented Mar. 21, 1922i Application led February 7, 1918. `Serial No.215,851.

To (l/whom 'if may conce/'11.'

Be it known that I. Hanvnv F. HANSEN. a citizen of the llnited States.and a resident of the citv of `Oakland` county of Alameda. and State ofCalifornia, have made a new and useful invention-to wit. Improvements inRotarv Engines; and I do hereby declare the following to be a full.clear. concise. and exact description of the same.

The invention relates particularly to rotary internal combustionengines.

Among the objects of my invention are to produce an engine wherein thefour cycles of intake, compression. expansion and exhaustion of gasestake place in one unit. one half of the engine performing always thesame two cycles` while the other half performs the other two cycles.each always performing the same two cycles: whereby the new fuel chargeis not taken into a foul chamber. eliminating the disadvantage ofresidual gases mixing with and having a quenching effect ou the new fuelcharge.

To construct an engine that is a true rotary engine by eliminating allreciprocating parts. such as ams. poppet valves. springs. connectingrods. pistons. push rods. and the like. with their incidental frictionand resis-tance.

l`o have the expansion of gases between two rotary members tend to forcetwo eenters apart. thus attaining motion. p

'l`o have the enclosing case revolve synchronously with theinternal.revolving member` To place all the suction spaces that areformed by the enclosing casing and the inner member radial to a commoncenter. where-by all spaces draw their supply of fuel an equal distancefrom the source of supply. thereby insuring each the advantage of anequal charge of fuel.

To construct an engine that will be light in weight and noiseless inoperation.

(Alther objects and advantages will appear as this descriptionprogresses.

ln this specification and the annexed drawings. the invention isillustrated in the form considered to bethe best. but it is to beunderstood that the invention is not limited to such form because it maybe embodied in other forms. and it is also to be understood that in andby the claims following the description it is desired to cover theinvention in whatever form it may be embodied. ,In the present engine,the outer casing,

and the inner rotor both rotate about their axes in the same direction,on different centers. whereby the periphery. of the rotor progressivelyadvances to, and recedes from the inner periphery of the outer casing,forming a variable crescent shape space between thertwo members, that isdivided into segmental spaces by transverse vanes pivoted in the outercasings and slidably pivoted in the rotor, whereby these segmentalspaces with their` variable volumes are made to perform the variouscycles in the operation of the engine. The expansion and contracf tionof these spaces is accomplished'by the rotation of the easing and therotor on different centers in synchronism. A synchronous drive isintroduced between these members to relieve the vanes from all stainsincidental to the transmission of power. or any other function. exceptthat of sealing.'r the endsof their respective spaces and tieoscillation ofthe valves. as wi be hereinafter described. Thesynchronous drivin'fz,r means is introduced to keep this outer casingand the rotor in synchronous motion,

and may be said to act as the fulcrum of the long leverage of the casingand the shorter leverage of the rotor. The function of this constructionis to cause these two centers ot' rotation to tend to pull apart due tothe force of the expanding fuel gas. this force operating through thesynchronous drive gives motion to both rotary parts around theirrespective fixed centers. Fuel is drawn into each alternate segmentalspace through valves operated b v the contiguous Yanes, by the naturalsuction created by the expansion of the space. These valves close at thepoint where the space begins to contract. The fuel charge is thencompressed by the contraction of the space and forced into the tiringchamber intermediate the alternate suction spaces. being admitted to thefiring i chamber through valves operated by the canting action of theconnecting vanes slidable therein. At the point where the compressionspace reaches its predetermined point of compression. these alves closeand the charge is ignited within the combustion chamber. simultaneouslywith which the .tiring chamber oscillates. opening the valves leadinginto the succeeding segmental space. wherein the gases expand betweenthe pcripheries of the rotating members. forcing them apart. androtating them about their centers as described. At the point of maxinthrough the exha-iistivalves operated by the connecting vanos. Thesespaces and chambers while revolvingaround their respective centersperform four distinct cycles, vperformi members, which action is takenadvantage of ing two cycles approximately" in one half revolution aroundthe center, and the other two cycles in approximately the last `half ofthe revolution.`

` In the present disclosure, there are six equally spaced oscillatingcylindrical chainbered sockets into which the vanes advance and recededuring rotation, the incidental. i,

cant of the vanes oscillating the cylindrical to open and close theinlet and exhaust `valves of the segmental spaces and the coni- I f.bastion chambers respectively.' 'There are i' ,threedistinct centersof-'operation in this ngine, .the center of the casing, the center .of1the inner-rotary member which 1s eccentric to `th'elirst center, and thethird center which is the imaginary point toward which allof the vanespoint in their concentric op- .'erationwith the outer casing, whichlatter y tions ot the tiring chaiiibersand vane sockets y in theirlorbit around' "the second center point determines the interplanetaryoscilla which is eccentric to the'casin ,"ontrolled by the vanes asdescribed. hese varies change their angular position twice during onerevolution in relation to the two centers of the outer and innersynchronously revolving members. The imaginary center toward which thevanes always point, represented by a star in the drawings in Figure land is eccentric to the centers of both the outer `and .the innerrevolving members. 40

Thus this engine attains 'four cycles by interpos- .ing a closed spacebetween eachtwo oscillating socket firingchambers and their connectingvaries, the entire unit having an even number ofj si'ihcies and half thenumber oi oscillating; sockets serving as firing chambers wherein thegases are finally compressed i `.and explosion takes place, and theother half actionr as cut-olf. valves for. the suction spaces, andexhaust valves 'for the exhaust gases. r

One halt' of the segmental spaces serve to take in gas and therecompress it into the oscillating firing chamber at its forward end. theother half of the spaces receive the exploded or expanded gas. from thissaine tiring chainliei and then exhaust it therefronrth'rough exhaustports through the casino; walls. It is-manifcstthat besides thc othernew and novel features of thisengrine.

is that of `having;r one' half` of the spaces and chamberspei"f`orinin.ar the Erst two cycles oi i intake and compression, theother half nurnlier of spaces and chambers performing the 4other twocycles of .the four cycle engine.

` The utilization :is .vaives of the oscillat on line lll-lll, Fig. 2.

ing sockets of the vanes in the rotor accomplishes the tunction 1n avery direct and ef- `it'ective inanner. It is obvious, however, thatFig. 4 is a front view showing the speed reducing' ,gears through abroken away4 section ot' their surrounding case. Fig. 5 is adiagrammatic illustration of one oscillating tiring,r chamber, showingthe positions of its two valves peit'orlning lr their two phases duringone revolution.

Fig. (i is a.diag'rainarnticl illustration of thc intake and exhaustvalves in one oscilloting vane socket, showing the position of its twovalves 'performing their two phases duringl one revolution. Fig. i isyan endview of an oscillating vane socket having intake and exhaustvalve passages therein. Fig. 8 is a fiattened diagrammatic lview of thecircumference of same.

` Fig. 9 is an end view. of the oscillatingr tiring.r chamber. Figa l0isl a diagrammatic view of the circumference of the same.

Fig.l l1-is a sectional View of Fig. 9 on line Kl-Xl. with separateddetails of the. .packingr rings showing how end packing or sealing otthi'x vane sockets is attained. Fig. l2 is an end elevation of the samewith packingr rings assembled. l

` Fig'. lt is a diagramma-tic layout of' the s\'iiclii' 'oiio|is drivingmeans by which s vnchronism between the outer casing); and the innerrotor is attained. Fig. 14 is a sidg clevationot' the hollow supporting:stud. f

Similar nu'inbcrs andjlctters refer to siini- 'lar parts througihout theseveral views.

ves

ferred means as shown, are the round studsI tween the centers ofeccentricity of the casing and rotor. -These openings are symmetricallylocated in a circle concentric to the center of the rotor The circle otrotation of the centers of the driving studs in the side iianges 2, andthe circle of rotation of the centers of the openings 8 in the rotor,are both of equal radius, each turning on its own individual center ineccentric relation to each other. The cylindrical openings 8 have toI beof a larger diameter to allow the casing and rotor to rotate insynchronism'without having the driving studs 7 bind in the openings 8.Figure 13 is a diagrammaticl layout ot' the movement ot' one riving studcarried around in its diiferent positlons durlng one revolution, showingthe constant traveling contact between the studs and the periplieries otthe openings 8. Any

number of these driving studs may be used to couple the two revolvingmembers together, prevent-ing back lash of the parts, and furnishingpositive and synchronous driving and timing between the casing and therotor.

Referring to the diagrammatic layouts in Fig. 5 and Fig. 6, the centerlines ot' all the vanes sliding in their oscillating joints always pointto 'an ima inary center Z, which is above the centers of the casing andY of lthe rotor, regardless of their position around the circumferenceof the. revolving parts. The vanes 9 reverse their angular positionswith regard to a vertical line through the centers X, Y. Z, once duringAthe first half of the revolution. At the end of the first halfrevolution the center line ot' a given vane points acrain radially'straight through the centers )5, Y and Z and is in the same alinementit had in the start of this first half revolution. The second haltrevolution restoring each 7ane to its original )osition with respectosaid three centers.

herefore, the oscillating socketchambers turn in a direction that is inthe lead of the rotation of the rotor 5, and during the lasthalf of therevolution they turn in a direction inverse tothe first movement and acounter direction to the lead of the rotor. resulting in the desirableearly opening ot the intake valves ,and lat-'e closing of the exhaustvalves. The oscillation ot these two sets of even numbersfof vanesockets, each having twov movements past said vertical line. causesthese oscillating chambers to perform two distinct cycles in onerevolution. Having an even number ot these oscillating vane sockets andan even number of tiring chambers, alternating around and near the outerperiphery ot the rotor 5, with the -vanes sliding therein, divides thecrescent shape space Jformed between the ecccntrically revolving caseand rotor into as many ysegmental spaces as there are vanes. Each mentalspace increases in size from a minimum to a maximum during the irsthalt' revolution and then decreases from a maxlmum to a minimum duringthe last half ot' the revolution. Fig, l shows the oscillatingcompression and explosion chambers within the vane sockets and marked10A. 10B, 100. The chamber 10A is at the top where the periphery of therotor 5 and the periphery of the casing 1 come in close contact.Alternately placed between the last numbered oscillating chambers arethe oscillating intake and exhaust valve sockets marked ll^, lln and11C. The chamber 10A at the top is in the tiring position with all valveports closed. These compression and explosion chambers 10", 10B and 10Chave the ports R and S through their outer shells on each side ,tot thesliding vanes 9, these ports register with another pair ot ports,lettered 0 and'P, which are lo ated in the walls of the rotor 5. Theoscillation ot' the vane sockets alternately establish communicationsthrough the ports R-S and-Oft, while the engine is revolving around thecentral stud 4.

Suitable ignition is provided. such as the magneto 23 which is directlydriven at en gine speed by the shaft 24, supported in bearings 25 and25', that are mounted in a cylindrical projection of the end plate 2G.

T he shaft 24 is keyed conccntrically in the cap 27 ot' the bearing 3.The secondary wires from the magneto pass through the rear engine trame26, in an insulation tube 2S, and connect to the three terminals 29. 30and 31, shown in Fig. 3. These connect to three Separate brushes inholders, the center one 30 is shown in cross section in Fig." 2. Eachone of these brushes 32 run in contact with'one ot' the three continuouscollector rings 33, 34 and 35, which are insulated from the engine partsas shown in cross section in Fig. 2, this insulation is inserted in thebearing cap 54 ot' the ball bearing 3 in the rear side plate 2' andrevolves with the casing.

The current is taken from the continuous rings 33. 3land 35. by theinsulated terminals 36, 37 and 38, shown in Fig. 3, 37 is shown in crosssection. The three terminals 53() and Si that connect to these separatebrushes are set into an insulated block of? fastenedpto the ring- 40having a flange with a section cut out into which the block 39 lits.thus enclosing the various part-s. This wide vnient for speed reduction.

practice,

shaft 44 in the conventional manner. The

. housing 41 which also supports one end ot the engine shaft on the stud47 fixed thereon having the bearing 48, and is bolted to the cross strut42 in any suitable mounting, such as 21. The opposite end 26 of theengine support is likewise bolted to a similar strut 42. The mounting orsupport for the engine will vary with circumstances incidental to itsinstallation, those shown rela-ting particularly to air plane practice.

To accomplish cooling I interpose an openingbetween the side plates 2and their central hubs 3 that is bridged across by .the oblique vanes57, which acting as blowers during rotation force a blast ot air throughthe center of the engine with great cooling effect, particularly uponthe interior of the rotor which is an annular channel shaped struc turewith its interior surfaces exposed to this transverse blast of air, withonly a single thickness of metal interveningv between the gases duringthe firing cycle and the cooling blast of air. The exterior of thecasing and the plate 2 may be provided with cooling' vanes or fins suchas 62.

To increase this cooling eifect, the interior of the rotor may beprovided with cooling vanes, such as 62.

Lateral sealing or packing between the sid' plates 2 and the sides 63 otthe rotor is accomplished by the packing ring sectors 64 shown in dottedlines in Fig. 1, and in cross section in Fig. 2, fitting similarlyshaped grooves formed in the sides 63 ot' the rotor and forced outwardby interposed springs,

the faces of the rings bearing against the side of the plates 2.

The endsof the vane sockets are similarly packed (see Figs. 11 and 12)by the packing rings 65, set into a recess 66 and surrounding the neck67. The ring 65 has a dat tace 68 to bear against the side plate 2 andthe tapered opposite face 69 bearing against a similarly tapered face onthe ring 70 seated within the recess 66, whereby the normal contractionof the ring 65 causes it to rise outward on the inclined face otthe ring70, giving the ring 65 .a lateral displacement to create a lateralpressure which iorces the face 68 against the plate 2 on one side andthe end 71 ot' the socket against the plate 2 on the opposite side otthe engine, to prevent leakage past the end-of the socket. The rings 65and 70 lare divided to pass the vanes 9 extending thcreinto. The sidesot the vanes are packed by the packing blocks 72-72 Fig. 9) reco sed inthc contiguous surface of the socket and adapted to be forced outward byinterposed springs 73. Various modifications ot' these packings may beresorted to to hermetically seal the segmental spaces between the rotorand the casving, ,as Well as the oscillating joints and vanes.

Lubrication ot' rotary engines presents few diiiiculties owing to thedistributive effect of centrifugal force, the utilization of which maybe made to carry to the periphery lubricant liberated near the center.For this purpose, l introduce oil through the tubes 52 and 53, by anysuitable. means, which lead to channels formed in the shaft 4 and havingbypasses leading to the bearings 6 (see Fig.

2) through which the lubricant. circulates and escapes through thebypasses 55-55 through a transverse groove 56 beneath the several vanesockets. These latter bypasses vextending through the spokes 57 joiningthe periphery of the rotor` to its hub 5S within which the bearings 6are placed. The oil escapes naturally from around the oscillating vanesockets into the space between the rotor and the casing, wherein itcollects upon the vanes 9 lubricating the same in their sliding motionin the sockets until it works through the exhaust port 15 and is dis-.charged from the engine. The other bearings beino' more or lessexternal are easily lubricatedJ in any-conventional manner.'

Having thus described my invention, what I claimand desire to secure byLetters Patent is: l

1. A rotary engine including a revolving casing and a rotor revoluble inthe same direction on 'different centers; a synchronous drive betweensaid casing and said rotor; a lvalve.; a vane pivoted in said casing andslidable, in said valve; and means for introducing a displacing mediumbetween said casing and said rotor through said valve. I

2. A rotary engine including a revolving casing and a rotor revoluble inthe same direction on different centers; a synchronous drive betweensaid casing and said rotor; an oscillating valve insaid rotor; a vanepivoted in said casing and sli'dable in said valve.

3. A rotary engine including a revolving casing and a rotor revoluble inthe same direction on different centers; a vane pivotal in both saidcasing and said rotor; a valve between the space between said casing androtor and the interior of said vane pivot.

4. A. rotary engine comprising a revolving casing and a rotor revolubleon different centers; vanes pivoted in said casing and slidable in saidrotor; valves in said rotor operated by said vanes; means forintroducing a displacing medium into the space between said casing androtor through said valves.

A rotary engine including a casing' Y alternate vane; each siderespectively `ot the' vanes Intermediate each saidoalternate varies, allot i exhaust valves opening into their Aand the adjacent `vanes.

clianibersz a vane pivotall)r interposed between said ca sing and rotor;and a valve coinmnnicatino between the spaces on opposite sides ot' saivane and operated by said vane.

6. A rotory 'engine including a casing anda rotor revolving on differentcenters;`

vanes pivotalliv interposed between said casing and rotor; andoscillating valves communicating between the spaces onopposite sides ofsaid vanes and operated by said valles; and-.inlet and outlet valves insaid spaces.` M

7. Afrotary engine includinga casing and4 a rotor revolubleon differentcenters; vanes pivotally interposed between said casing and `rotor;oscillating` valvescommunicating between tlie spaces on oppositesidesjof each inlet and exhaust valves on sald valves operated `by theirrespective vanes.V n i 8. A rotary engine including a casingand arotor'fre'voluble Non different centers; pivotal vanes slidable .inhollow oscillating sockets and interposed between said casing i ot the`ioininunicating with the spaces on opposite sides ot the vanes slidabletherein; and valves in said exhaust chambers communieating 'Withthespaces on opposite sides 'anes slidable therein.

13. A rotory engine including a casing andarotor revoliible (indifferentcenters; vanes interposed between said casing and rotor dividing thespace between said casing androtor .into segmental spaces; tiringchambers between alternate vanes having' valvswcornniiinicating with thesaid spaces v on 'opposite sids'ot said alternate vanes; and

inlet and `exhaust valves con'imiinicating respectively with the saidspaces on opposite sidesiof said vanes intermediate said alternatevaries. x

ll. A rotary engine including;- a

casing and a rotor revoluble on different centers;

vanes interposed between said casing and' ro 985 torpliiing chambersrevolving in an orbit around said centers and communicating with thespaces on opposite sides of alternate said vanes; inlet and exhaustvalvesv communieating respectivelvjwith the spaces on op-Vposit.;e,s1di.\s of said vanes intermediate said and rotor;valves`communicating between the 1spaces on opposite sides ot' eachalternate vane through saidsockets; inlet and exhaust valves on eachsiderespectiveli` of the varies intermediate each said alternate vanes. saidrespective sockets;` and means `for introducing a dis- Jlacinir mediumthroiwh said inlet valve to PJ l* the space between said casing and`rotor and `9. A rotar) engineincluding a casing and a rotor revoliibleon different centers: an oscillatable vane interposed between saidcasing and said rotor;`a firing chamber revolving in an orbit about saidcenters and intermittently comniunicating with tliespacc betweensa'idcasing and rotor on opposite sides of said vane. i

1i). A-rotary` and" a iotolrrevoliiblc on different centers; anoscillati, llo vane interposed bctiveen said `asing and rotor; asynchronous vdrive means engine including a casing" `thiiough said inlet`means inleach of said .tiring chambers.

alternate vanes: means valves; and ignition l5. A rotary engineincluding a casing and a rotor revoluble on differenti-enters; vanosdividing the spanisbetween said casing and rotor into segmental spaces:a tiring chamber revolving in an orbit around said centei's:-n1eans forintroducing fuel into alter nate said segmental spaces; means for trans-`tering said fuel into said i'iring chamber and igniting it. andtransferring it to the succeeding segmental chamber and' exhausting ittherefrom.

lo. rotar)Y engine including a casing and a said casingl and rotor intosegmental chambers; liring-chainbcrs lbetween said alternate segmentalspaces: means tor introducing fuel interposed betweensaid casing'androtor;-

into one of said segmental spaces andcompressing it into and firing itwithin the adjacent firing chamber: and'means tor trans- 'tori-ingv andespand-inzg ft'in the succeeding segmental chamhe and exhausting ittherefrom during onefrewoliition of said casing.

1T. A rotary engine including a casing and a rotor revolubleon'diilerent centers; synchronous `-driving means interposed betweensaid casingand rotor; vanes inter- *posed between said rotor and casingdividing-fthe intervening space into segmental i spaces; 'firingzchambers between alternate segmental f spaces; means.' for introducingfuel `into yalternate said spaces andcompressing it onto and tiring itwithin said tiring `chambers: and means for transferring and' expandingit in thesucceeding segmental space and exhausting it therefrom andretor introducing fuel ion peating the said four cycle sequence ofoperation seriatim around said centers.

18. A rotarj1 engine including a casing and a rotor revoluble onditferent centers: oscillating vane sockets in said rotor havingopenings registering with ports through said casing; vanes pivoted iusaid casmg and slidable in said sockets; oscillating tiring chambers insaid rotor intermediate said vane sockets: vanes pivoted in said casingand slidable in said chambers; valves in said chambers communicatingwith the spaces on opposite sides of the vanes in said chambers; exhaustvalves in said sockets communicating with the adjacent space on one sideof the vanes therein and the interior of said sockets; and intake valvesin said sockets and communicating with the space on the opposite side ofthe vanes in said sockets: and means for introducing ignitable fuelthrough said inlet 'alvesz and means for iguiting said fuel in saidfiring chambers.

1S). A rotar)v engine including a casing and a rotor revoluhle ondifferent centers; synchronous driving means interposed between saidcasing and rotor; oscillating vane sockets in said rotor having openingsregistering with ports through said casing; vanes pivoted in said casingand slidable in said sockets: oscillating firing chambers in said rotorintermediate said vane sockets; vanes pivoted in said casing andslidable in said chambers: valves in said chambers communicating withthe spaces on opposite. sides of the vanes in said chambers: exhaustvalve in said sockets communicating with the adjacent space on-one sideof the 'anes therein and the interior of said sockets: and intake valvesin said sockets and communicating with the space on the opposite side ofthe vanes in said sockets; and means for introducing ignitable fuelthrough said inlet valves; and means for igniting said fuel in saidtiring chambers. j

20. A rotary engine including `a casing and a rotor revoluble ondifferent centers; oscillating vane sockets in said rotor haulingopenings registering with ports through said casing: vanes pivoted insaid casing and slidable in said sockets; oscillating tiring chambers insaid rotor intermediate said vane sockets; vanes pivoted in said casingand slidable in said chambers; valves in said chambers communicatingwith the spaces on opposite sides of the vanes in said chambers; exhaustvalves in said sockets communicating with the adjacent space ou one sideof the vanes therein and the interior of said sockets; and intake valvesin said sockets and communicating with tho space on the opposite si'deof the vanes in said sockets; a hollow shaft enclosing the said centerof said rotor; a manifold communicating with said hollow Shaft andhaving extensions to said intake valves; and means for introducing fuelinto said. hollow shaft.

21. A rotary engine having -a revoluble concentric annular casing withan open center around la hub; au annular rotor *within said casing andrevoluble on a different cen-l ter: oscillating vane sockets in saidrotor having openings registering with .ports through said casing; vanespivoted in said casing and slidable in said socketsi oscil-l latingfiring chambers in said rotor inter.- mediate said 'ane sockets: vanespivoted in said casing and slidable in said chambers; calves in saidchambers communicating with the spaces on opposite sides of the vanes insaid chambers exhaust valves in said sockets communicating with theadjacent space, on one side of the vanes therein and the interior ofsaid sockets; and intake Valves in said sockets and'communicating withthe space on the opposite side of the vanes in said sockets; means forintroducing ignitable fuel through said inlet valves; and means forigniting said fuel in said firing chambers.

Q2. A rotar.;1 engine having a revoluble concentric annular casing withan open center around a hub; an annular rotor within said casing andrevoluble on a different center; and synchronous driving meansinterposed between said casing and rotor; oscillating vane sockets insaid rotor having openings registering with ports through said casing;vanes pivoted in said casing' 100 and slidable in said sockets;oscillating tiring chambers in said rotor intermediate saidvane sockets;vanes pivoted in said casing and slidable in said chambers; valves insaid chambers communicating with the spaces on opposite sides of theVanes-`1n said chambers; exhaust valves in said sockets communicating-with the adjacent space on one side of the vanes therein and theinterior of said sockets; and intake valves in said sockets andcommunicating with the space on the oppositeside of the vanes in saidsockets; means-for introducing iguitable fuel through said inletivalves;andv means for igniting said fuel in said firing chambers.

23. A rotary engine including a casing and a rotor revoluble ondifferent centers; synchronous driving means interposed between saidcasing and rotor; oscillating vanav sockets in said rotor havingopenings registering with ports through said casing; vanes pivoted insaid casing and slidable in said sockets; oscillating firing chambers insaid rotor intermediate, ksaid vane sockets; vanes 1'26 pivoted in saidcasing and slidable in said chambers; valves in said chambers communicating with the spaces on o posite sides of the vanes in saidchambers; ex aust valves in said sockets'communicating with the ad- 180`ing with the enclosing the' jacent sparse on one side of the Yanesthere in and thel interior of Suid socket; ami 1n take valves insuidsockets and communicatspace on the opposite side of said sockets; nlhollow shaft the vanes in saldeenter of said rotor; a

l l inanifold rcommunicating with said hollow shaft imd havingextensions to said intake valyes; and 'means for introducing fuel intosaid hollow shaft.'`

24. A.l rotary engine including a easing md a V1" tor synchronouslyrevoluble in the seme directionon `different centers; varies YTinterposed?lmatiw'eensaid casing' Lzml! rotor;

un oscllatable firing chamber engaging said vaines; means forintroducing fuel into said firing chamber; ing chamber; and means`whereby said engine performs four4 cycles of operation during onerevolution.

.In testimony whereof, I have hereunto set myhand at San Francisco,California, this 26th day of January, 1918.

HNRVEY F. HANSEN.

In presence ofn LINCOLN V. JoHNsoN, A. J. HENRY.

ignitionV means in said ir-

